Air inlet pressure and rotational flow combined distortion measuring device
Through the design of the ring structure and cylindrical porous array probe, the problems of measurement interference and processing difficulty in traditional measurement methods are solved, and high-precision and high-resolution intake pressure and swirl combined distortion measurement are achieved, providing detailed flow field data support.
Patent Information
- Application Number
- CN202511178424.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2025-10-17
AI Technical Summary
Traditional measurement methods cannot accurately measure the intake pressure and swirl combined distortion in complex flow fields, and increasing the measurement points will lead to an increase in probe size, increased processing difficulty and measurement interference.
The ring-structured measuring ring and cylindrical multi-hole probe, combined with a servo and programmable logic controller, achieve high-resolution measurement through 8 evenly distributed through holes and multiple pressure-sensitive holes. Metal 3D printing and polishing processes are used to reduce roughness and minimize flow field interference.
It achieves high-precision and high-resolution measurement of intake pressure and swirl combined distortion, maintains the original state of the flow field, reduces the difficulty of processing and calibration, and provides detailed and accurate flow field data support.
Smart Images
Figure CN120800809A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of intake passage and engine compatibility evaluation test, and particularly relates to an intake pressure and swirl combined distortion measuring device. BACKGROUND
[0002] In the intake passage and engine compatibility evaluation test, it is crucial to accurately measure the intake pressure and swirl combined distortion. The traditional measuring method has many shortcomings, for example, the traditional 8*5 point total pressure measuring rake can only measure and evaluate the total pressure distortion, and the function is single, which cannot meet the demand of comprehensive measurement of pressure and swirl combined distortion in complex flow field.
[0003] The SAE AIR 5686 standard recommends using a radial multi-point three-hole probe to measure the swirl angle, and the three-hole probe can be used for swirl angle testing, because the swirl angle calculation only needs the circumferential component of the airflow angle. The three-hole probe can measure the swirl to some extent, and can also measure the pressure distortion, but due to the low resolution of the radial measuring points of the three-hole probe, and the complex and variable characteristics of the swirl distortion in the actual flow field, the low resolution of the radial measuring points cannot accurately capture the subtle changes of the flow field, and cannot accurately evaluate the swirl distortion. If you try to increase the resolution by increasing the radial measuring points, it will cause a series of new problems. On the one hand, the size of the measuring probe will increase significantly, which will cause great disturbance to the airflow in the actual flow field, change the original distortion flow field state, and seriously affect the measurement accuracy. On the other hand, after the size of the measuring probe is increased, the processing difficulty is greatly improved, the manufacturing process requirements are more stringent, and the calibration process becomes extremely complex, which requires a lot of manpower, material resources and time cost, greatly increasing the difficulty and uncertainty of measurement.
[0004] At present, it is urgent to develop an intake pressure and swirl combined distortion measuring device. SUMMARY
[0005] The technical problem to be solved by the present application is to provide an intake pressure and swirl combined distortion measuring device to overcome the defects of the prior art.
[0006] The intake pressure and swirl combined distortion measuring device of the present application comprises a measuring ring, 8 cylindrical multi-hole array probes and a steering engine. The measuring ring is a circular ring structure, and the inner diameter of the circular ring matches the diameter of the flow field to be measured. The measuring ring is provided with 8 evenly distributed through holes in the circumferential direction, and each through hole is provided with a cylindrical multi-hole array probe. Each cylindrical multi-hole array probe is provided with a corresponding steering engine. The steering engines are installed on the outside of the measuring ring, and the steering engines are connected in series through control cables. The steering engines are synchronously controlled by a control device to ensure that the rotation angles of the steering engines are the same. The cylindrical multi-hole row probe body is integrally formed by metal 3D printing, and comprises a measurement section and a clamping section connected in sequence; the measurement section is a stepped cylindrical rod, the diameter of the stepped cylindrical rod gradually increases from inside to outside, and each step is smoothly transitioned through a tapered section; the clamping section is a regular hexagonal prism, used for positioning and installing the cylindrical multi-hole row probe, and the pressure lead-in pipeline in the clamping section is transitioned from a fan-shaped section to a circular section; the tail end of the clamping section is externally connected to a pressure measuring device through a stainless steel capillary tube and a hose connected in sequence; The top end of the measurement section is a hemispherical head, facing the center of the measurement ring; the tail end surface of the measurement section is a pressure lead-in pipeline outlet section; the diameter of the front section of the measurement section is 3 mm, the diameter of the rear section is 5 mm, and a chamfer is used for transition between the two sections; 12 equidistantly distributed pressure sensing holes are arranged on one side of the measurement section, and the 12 pressure sensing holes are sequentially numbered as #1 pressure sensing hole to #12 pressure sensing hole from the front end to the rear end, and the axis of each pressure sensing hole is perpendicular to the surface of the cylindrical rod of the measurement section; the pressure lead-in pipeline outlet section of the measurement section is divided into 12 pressure lead-in pipelines, which are divided into inner circle pipelines and outer circle pipelines; there are 4 pressure lead-in pipelines in the inner circle pipelines, which are respectively communicated with #1 pressure sensing hole to #4 pressure sensing hole, and #1 pressure sensing hole to #4 pressure sensing hole are located in the front section of the measurement section; there are 8 pressure lead-in pipelines in the outer circle pipelines, which are respectively communicated with #5 pressure sensing hole to #12 pressure sensing hole, and #5 pressure sensing hole to #12 pressure sensing hole are located in the rear section of the measurement section; for the inner circle pipelines, the distance between adjacent pressure sensing holes is 1 / 4 of the pitch, the pressure lead-in pipelines of #1 pressure sensing hole to #3 pressure sensing hole are sequentially led out from the corresponding pressure sensing hole positions along the inner circle helix and a straight line, and the pressure lead-in pipeline of #4 pressure sensing hole is led out from the corresponding pressure sensing hole position along a straight line; for the outer circle pipelines, the distance between adjacent pressure sensing holes is 1 / 8 of the pitch, the pressure lead-in pipelines of #5 pressure sensing hole to #11 pressure sensing hole are sequentially led out from the corresponding pressure sensing hole positions along the inner circle helix and a straight line, and the pressure lead-in pipeline of #12 pressure sensing hole is led out from the corresponding pressure sensing hole position along a straight line.
[0007] Further, the surface of the measurement section is processed by cutting to reduce roughness.
[0008] Further, the steering engine is installed on the outside of the measurement ring through the connecting structure.
[0009] Further, the control device adopts a programmable logic controller, and through programming setting, the cylindrical multi-hole row probe is measured at three roll angles of -30°, 0° and 30°.
[0010] The inlet pressure and swirl combination distortion measuring device has the following characteristics: a. Small disturbance to actual flow field: compared with the situation that the traditional measurement method causes larger disturbance to the flow field due to the increase of the probe size, the present application effectively reduces the probe size through the stepped cylindrical shape design of the measurement section, and the disturbance to the actual flow field is extremely small during the measurement process, so that the original state of the actual flow field can be maintained to the greatest extent, thereby ensuring the authenticity and reliability of the measurement results; b. High measurement resolution: through the arrangement of multiple radial measurement points on the cylindrical multi-hole array probe and the reasonable layout of the pressure lead pipe, the spatial resolution of the present application is greatly improved, and the subtle features of complex pressure and swirl combination distortion can be accurately captured, so that more detailed and accurate data can be provided for the inlet duct and engine compatibility evaluation, which helps to deeply understand the flow field characteristics and improve the accuracy and scientificity of the evaluation; c. Reduced processing and calibration difficulty: while ensuring high resolution measurement, the present application avoids the problem that the processing and calibration difficulty of the probe is significantly increased due to the increase of the measurement points. The cylindrical multi-hole array probe adopted in the present application maintains relatively simple processing technology and calibration process while improving the measurement performance, thereby reducing the production cost and operation difficulty.
[0011] In short, the inlet pressure and swirl combination distortion measurement device of the present application has the characteristics of high precision and high resolution, and has small disturbance to the actual flow field, so that the inlet pressure and swirl combination distortion can be accurately measured, reliable data support can be provided for the inlet duct and engine compatibility evaluation, and the device has good practicability and popularization value. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 Fig. 1 is a structural schematic view of the inlet pressure and swirl combination distortion measurement device of the present application; Figure 2 Fig. 2 is a structural schematic view of the cylindrical multi-hole array probe in the inlet pressure and swirl combination distortion measurement device of the present application; Figure 3 Fig. 3 is a structural schematic view of the probe measurement section of the cylindrical multi-hole array probe in the inlet pressure and swirl combination distortion measurement device of the present application.
[0013] In the figure, 1. measurement ring; 2. cylindrical multi-hole array probe; 3. rudder; 2-1. measurement section; 2-2. clamping section; 2-3. pressure sensing hole. DETAILED DESCRIPTION
[0014] The present application will be described in detail below in combination with the drawings and examples.
[0015] Example: the inlet pressure and swirl combination distortion measurement device of the present embodiment comprises a measurement ring 1, eight cylindrical multi-hole array probes 2 and a rudder 3. As Figure 1As shown, the measuring ring 1 is a circular ring structure, and the inner diameter of the ring matches the diameter of the flow field to be measured; the measuring ring 1 has 8 evenly distributed through holes along the circumference, and a cylindrical multi-hole row probe 2 is installed in each through hole. Each cylindrical multi-hole row probe 2 is provided with a corresponding steering gear 3; the steering gear 3 is installed on the outside of the measuring ring 1, and the steering gears 3 are connected in series via control cables. The steering gears 3 are synchronously controlled by a control device to ensure that the rotation angles of the steering gears 3 are the same; like Figure 2 As shown, the main body of the cylindrical porous row probe 2 is integrally formed by metal 3D printing, and includes a measuring section 2-1 and a clamping section 2-2 connected in sequence; the measuring section 2-1 is a stepped cylindrical rod, the diameter of which gradually increases from the inside to the outside, and each step is smoothly transitioned by a tapered section; the clamping section 2-2 is a regular hexagonal prism, used for positioning and installing the cylindrical porous row probe 2, and the pressure-inducing pipeline inside the clamping section 2-2 transitions from a fan-shaped cross-section to a circular cross-section; the tail end of the clamping section 2-2 is connected to an external pressure measuring device through a stainless steel capillary and a hose connected in sequence; like Figure 3 As shown, the top of the measuring section 2-1 is a hemispherical head, facing the center of the measuring ring 1; the tail end face of the measuring section 2-1 is the lead-out end section of the pressure pipeline; the diameter of the front section of the measuring section 2-1 is 3mm, the diameter of the rear section is 5mm, and a chamfered transition is adopted in the middle; 12 pressure-sensing holes 2-3 with equal axial spacing are set on one side of the upper edge of the measuring section 2-1, and the 12 pressure-sensing holes 2-3 are marked as #1 pressure-sensing hole to #12 pressure-sensing hole from the front end to the rear end, and the axis of each pressure-sensing hole 2-3 is perpendicular to the cylindrical rod surface of the measuring section 2-1; the lead-out end section of the pressure pipeline of the measuring section 2-1 is divided into 12 pressure pipelines, and the pressure pipelines are divided into inner ring pipelines and outer ring pipelines; the inner ring pipeline has 4 pressure pipelines, which are respectively connected to the #1 pressure-sensing hole to #4 pressure-sensing hole, and the #1 pressure-sensing hole to #4 pressure-sensing hole are located at the measuring section. In the front section, the outer circle pipeline has 8 pressure-leading pipelines, which are respectively connected to the #5 to #12 pressure-leading holes. The #5 to #12 pressure-leading holes are located in the rear section of the measuring section. For the inner circle pipeline, the spacing between adjacent pressure-leading holes 2-3 is 1 / 4 of the pitch. The pressure-leading pipelines of the #1 to #3 pressure-leading holes are respectively led out from the corresponding pressure-leading holes 2-3 along the inner circle spiral line and the straight line, and the pressure-leading pipeline of the #4 pressure-leading hole is led out from the corresponding pressure-leading hole 2-3 along the straight line. For the outer circle pipeline, the spacing between adjacent pressure-leading holes 2-3 is 1 / 8 of the pitch. The pressure-leading pipelines of the #5 to #11 pressure-leading holes are respectively led out from the corresponding pressure-leading holes 2-3 along the inner circle spiral line and the straight line, and the pressure-leading pipeline of the #12 pressure-leading hole is led out from the corresponding pressure-leading hole 2-3 along the straight line.
[0016] Furthermore, the surface of the measuring section 2-1 is polished to reduce roughness.
[0017] Further, the steering engine 3 is installed on the outside of the measuring ring 1 through a connecting structure. The connecting structure is required to accurately control the rotation angle of the cylindrical multi-hole row probe 2, and is also required to have sufficient strength to withstand external forces that may occur during measurement, on the premise of ensuring flexibility and accuracy of rotation.
[0018] Further, the control device adopts a programmable logic controller, which realizes measurement of the cylindrical multi-hole row probe 2 at three roll angles of -30°, 0° and 30° through programming setting.
[0019] The inner diameter of the measuring ring 1 of the embodiment is 260 mm, the measuring section 2-1 is 100 mm long, the measuring section 2-1 is divided into two sections, the rear section has a diameter of 5 mm, the front section has a diameter of 3 mm, and the pressure sensing hole 2-3 has an inner diameter of 0.4 mm. The outer side wall thickness of the cross section of the pressure introduction pipeline leading end of the measuring section 2-1 is 0.5 mm, and the inner part of the cross section is divided into a pipeline wall thickness of 0.3 mm.
[0020] The measurement process of the inlet pressure and combined swirl distortion measurement device of the embodiment is as follows: S10. Install the measuring device; Install the measuring device at the test position of the inlet duct and engine compatibility evaluation test, ensure that the measuring device is located in the flow path position of the flow field to be measured, and can effectively measure the required flow field parameters; S20. Perform measurement test; Start the measuring device, and the control device controls the eight steering engines 3 to rotate synchronously according to the preset program, so that the corresponding cylindrical multi-hole row probes 2 measure at three roll angles of -30°, 0° and 30° in turn; At each angle, the pressure sensing hole 2-3 of the cylindrical multi-hole row probe 2 simultaneously measures the pressure in the flow field, and conducts the pressure to the subsequent data acquisition and processing system through the pressure introduction pipeline; S30. Perform data processing; The data acquisition and processing system processes the collected pressure data, and calculates the flow field parameters including total pressure, static pressure, Mach number and flow angle in the flow field to be measured according to the calibration data of the cylindrical multi-hole row probe 2 and the measured pressure data; S40. Perform measurement and evaluation of inlet pressure and combined swirl distortion of the flow field to be measured; Analyze and arrange the flow field parameters to provide detailed and accurate data support for the compatibility evaluation of the inlet duct and the engine; according to the evaluation requirements, statistically analyze and predict the trend of the flow field parameters, and provide data support for related research and engineering application.
[0021] While embodiments of the application have been disclosed in connection with the above specification, it will be apparent to those skilled in the art that numerous modifications and variations can be made without departing from the principles of the application. For example, although the application has been described in the context of a particular method, it will be apparent that the application can be implemented in any appropriate type of computer system, or in a computer program product suitable for use in an information handling or processing system. The application is not to be limited to the specific details and examples described above, but is to be controlled by the claims and their equivalents.
Claims
1. A device for measuring combined intake pressure and swirl distortion, characterized in that: The measuring device comprises a measuring ring (1), eight cylindrical multi-hole probes (2) and a steering gear (3); The measuring ring (1) is a circular ring structure, and the inner diameter of the circular ring matches the diameter of the flow field to be measured; the measuring ring (1) is provided with 8 evenly distributed through holes along the circumference, and each through hole is respectively installed with a cylindrical multi-hole row probe (2), and each cylindrical multi-hole row probe (2) is respectively provided with a corresponding steering gear (3); the steering gear (3) is installed on the outside of the measuring ring (1), and each steering gear (3) is connected in series through a control cable, and each steering gear (3) is synchronously controlled by a control device to ensure that the rotation angle of each steering gear (3) is the same; The main body of the cylindrical multi-hole row probe (2) is integrally formed by metal 3D printing, and includes a measuring section (2-1) and a clamping section (2-2) connected in sequence; the measuring section (2-1) is a stepped cylindrical rod, the diameter of which gradually increases from the inside to the outside, and each step is smoothly transitioned by a cone section; the clamping section (2-2) is a regular hexagonal prism, used for positioning and installing the cylindrical multi-hole row probe (2), and the pressure-inducing pipeline inside the clamping section (2-2) transitions from a fan-shaped cross section to a circular cross section; the tail end of the clamping section (2-2) is connected to an external pressure measuring device through a stainless steel capillary and a hose connected in sequence; The top of the measuring section (2-1) is a hemispherical head, facing the center of the measuring ring (1); the tail end face of the measuring section (2-1) is the lead-out end section of the pressure-inducing pipeline; the diameter of the front section of the measuring section (2-1) is 3 mm, the diameter of the rear section is 5 mm, and a chamfered transition is used in the middle; 12 pressure-sensing holes (2-3) with equal axial spacing are arranged on one side of the upper edge of the measuring section (2-1), and the 12 pressure-sensing holes (2-3) are marked as #1 pressure-sensing hole to #12 pressure-sensing hole from the front end to the rear end, and the axis of each pressure-sensing hole (2-3) is perpendicular to the cylindrical rod surface of the measuring section (2-1); the lead-out end section of the pressure-inducing pipeline of the measuring section (2-1) is divided into 12 pressure-sensing pipelines, and the pressure-sensing pipelines are divided into inner ring pipelines and outer ring pipelines; the inner ring pipeline has 4 pressure-sensing pipelines, which are respectively connected to the #1 pressure-sensing hole to #4 pressure-sensing hole, and the #1 pressure-sensing hole to #4 pressure-sensing hole are located at the bottom of the measuring section (2-1). At the front section of the measuring section, the outer ring pipeline has 8 pressure-leading pipelines, which are respectively connected to the #5 pressure-sensing hole ~ #12 pressure-sensing hole, and the #5 pressure-sensing hole ~ #12 pressure-sensing hole are located in the rear section of the measuring section; for the inner ring pipeline, the spacing between adjacent pressure-sensing holes (2-3) is 1 / 4 of the pitch, and the pressure-leading pipelines of the #1 pressure-sensing hole ~ #3 pressure-sensing hole are respectively led out from the corresponding pressure-sensing hole (2-3) positions along the inner ring spiral line and straight line, and the pressure-leading pipeline of the #4 pressure-sensing hole is led out from the corresponding pressure-sensing hole (2-3) position along a straight line; for the outer ring pipeline, the spacing between adjacent pressure-sensing holes (2-3) is 1 / 8 of the pitch, and the pressure-leading pipelines of the #5 pressure-sensing hole ~ #11 pressure-sensing hole are respectively led out from the corresponding pressure-sensing hole (2-3) positions along the inner ring spiral line and straight line, and the pressure-leading pipeline of the #12 pressure-sensing hole is led out from the corresponding pressure-sensing hole (2-3) position along a straight line.
2. The intake pressure and swirl combined distortion measuring device according to claim 1, characterized in that: The surface of the measuring section (2-1) is polished to reduce roughness.
3. The intake pressure and swirl combined distortion measuring device according to claim 1, characterized in that: The steering gear (3) is mounted on the outside of the measuring ring (1) via a connecting structure.
4. The intake pressure and swirl combined distortion measuring device according to claim 1, characterized in that: The control device adopts a programmable logic controller, and through programming, it enables the cylindrical multi-hole row probe (2) to perform measurements at three roll angles of -30°, 0° and 30°.